TB18 Spasm Vessel

Reviewed by · Licensed Acupuncturist & TCM Physician · Last reviewed June 2026

TB18 (Chìmài, “Spasm Vessel”) is an acupuncture point on the Triple Burner Meridian. It is located posterior to the ear, in the center of the mastoid process, at the junction of the middle and lower thirds of the curve behind the ear. It benefits the ear, calms spirit.

Location

Posterior to the ear, in the center of the mastoid process, at the junction of the middle and lower thirds of the curve behind the ear.

Needling

Oblique insertion 0.3-0.5 cun.

TCM functions

Benefits the ear, calms spirit.

Indications

Tinnitus, deafness, headache, infantile convulsions.

Clinical notes

TB18 is a key local point for ear problems, particularly tinnitus, deafness, and earache, especially when accompanied by spasms or tension in the surrounding muscles. Its name 'Spasm Vessel' reflects its ability to alleviate muscle spasms and pain in the neck and jaw region. It also has a calming effect on the spirit, making it useful for anxiety or insomnia related to head and ear discomfort.

On the Triple Burner channel

TB18 is one of 23 points on the Triple Burner Meridian. Nearby points:

Frequently asked questions

Where is TB18 located?

TB18 (Chìmài) is located posterior to the ear, in the center of the mastoid process, at the junction of the middle and lower thirds of the curve behind the ear.

What is TB18 used for?

TB18 benefits the ear, calms spirit. Common clinical indications include tinnitus, deafness, headache, infantile convulsions.

How is TB18 needled?

Oblique insertion 0.3-0.5 cun.

Which meridian is TB18 on?

TB18 is a point on the Triple Burner Meridian (Sān Jiāo).

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⚠️ This page is for general education and is not medical advice. Acupuncture is a traditional practice; evidence varies by condition and study quality, and individual results differ. It does not replace diagnosis or treatment by a licensed professional. Always consult a qualified acupuncturist or physician.